Where am I getting it wrong?

Question

IDE exeption "The local variable answer may not have been initialized"

package com.operators;

import java.util.Scanner;

public class SquareRoot {

//@MMS
public static void main(String[] args) {

String answer;

do {

//Ask for user input
System.out.print("Insert a number to calculate: ");

//User types number to be calculated
Scanner sc = new Scanner(System.in);
double a;
a = sc.nextDouble();

//Calculates square root if user types negative number
if (a <= 0) {
double ans = Math.sqrt(a*-1);
System.out.println("The square root of "+a +" is " +ans+"i");
}

//calculates square root if user types positive number
else {
double ans = Math.sqrt(a);
System.out.println("The square root of "+a +" is " +ans);

System.out.println("Do you want to calculate another number? YES or NO\n");
answer = sc.next();
sc.close();
}
} while (answer.equalsIgnoreCase("YES"));
}
}

Answer 1

Awsome. Thank you.